Change: searchable database of these materials is University Channel, though Princeton University. This does not include all of the webcasts in the AUR catalog, however.Also, look at ITunes U, which includes lots of podcasts and webcasts, many of them available for free.   View changes from previous version. (Word count: 155)

Change: Webcasts and Podcasts are presentations of different types and are made sharable over the Internet. Many universities and educational institutions have made the public lectures   View changes from previous version. (Word count: 137)